Jon Stephen Portnoff, M.D.
NPI 1609874445ActiveIndividual· Internal Medicine, Cardiovascular Disease· Ukiah, CA
Internal Medicine, Cardiovascular Disease (M.D.) with Adventist Health Physicians Network and 2 other groups, practicing in Ukiah, California. Their prescriptions cost Medicare Part D more than their services did: $898,642 for 4,058 claims, against $143,700 paid for services in 2024. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 2 companies reporting payments in 2024, $134.05 in all, mostly food and beverage. Lists Adventist Health Clearlake and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1609874445 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 13, 2005 |
| Last updated in NPPES | Oct 25, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | A43219 | CA |
| Internal Medicine, Interventional Cardiology | 207RI0011X | A43219 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,039 |
|---|---|
| Services billed | 3,181 across 27 procedure codes |
| Paid by Medicare | $143,700 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,058 · 9,328 30-day fills |
|---|---|
| Patients | 620 |
| Total drug cost | $898,642 |
| Generic share | 79% of claims |
Education and affiliations
| Graduation year | 1984 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical groups
- Adventist Health Physicians NetworkSaint Helena, CA · 628 clinicians
- Ukiah Adventist HospitalUkiah, CA · 135 clinicians
- Willits Hospital IncWillits, CA · 67 clinicians
Hospital affiliations
- Adventist Health ClearlakeClearlake, CA
- Adventist Health Howard MemorialWillits, CA
- Adventist Health Mendocino CoastFort Bragg, CA
- Adventist Health St HelenaSaint Helena, CA
- Adventist Health Ukiah ValleyUkiah, CA
Industry payments (Open Payments)
- 2024$134.05 · 3 payments from 2 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $97.03 | 1 |
| Amgen Inc. | $37.02 | 2 |
What the 2024 payments were for
- Food and Beverage$134.05 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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